<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    html * {
      padding: 0;
      margin: 0;
    }

    .layout article div {
      min-height: 100px;
    }
  </style>
</head>

<body>
  <section class="layout float">
    <style>
      .layout.float .left {
        float: left;
        width: 300px;
        background-color: aquamarine;
      }

      .layout.float .right {
        float: right;
        width: 300px;
        background-color: bisque;
      }

      .layout.float .center {
        background-color: blue;
      }
    </style>
    <article class="left-right-center">
      <div class="left"></div>
      <div class="right"></div>
      <div class="center">
        <h1>doshdh</h1>
        1.dhsdhf
        2.dhfdhh
      </div>
    </article>
  </section>
</body>

</html>